The findings mark a milestone in an unlikely new animal model for understanding the biology of aggression and how the nervous system gives rise to different behaviors.

这个发现成为里程碑性的标志，它为攻击行为的生理学研究和神经系统是怎样引发不同行为的研究提供了可能的新型动物模型。

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Restarting the cooling pumps would mark a major milestone in the struggle to prevent the nuclear disaster from worsening.

重启冷却泵将是在防止核灾难恶化的斗争中的一个重大里程碑。

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The largest emerging markets are recovering fast and starting to think the recession may mark another milestone in a worldwide shift of economic power away from the West.

这些最大的新型经济体恢复迅速，并开始认为这次经济大萧条可能会标志着全球范围的经济实力从西方转移。

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It remains to be seen whether the passing of Mary Lou Forbes will mark not only the loss of America's greatest newspaperwoman but a milestone in the demise of the conservative newspaper the nation's capital so badly needs and has - in no small measure, thanks to Mary Lou - been improved by over the past 26 years.

CENTERFORSECURITYPOLICY: In Honor of Mary Lou Forbes

Samsung marked a new milestone during the third quarter, pushing through the 70 million unit mark for the first time in the company's history.

ENGADGET: IDC: Apple passes RIM to become fourth largest mobile phone vendor globally as Nokia, LG, and Sony Ericsson struggle

Similar to the recent difficulty of identifying the seven billionth human born on earth (that prize went to Danica May Camacho, a girl born in the Philippine capital of Manila, symbolically chosen by the UN to mark the global population milestone), it is understandable if Apple used location as an important factor in calculating their tiebreaks.

FORBES: Winner of 25 Billionth Apple App Store Download was a Chinese Consumer, Coincidence?